What is Fresnel LensThe Fresnel lens was invented by French physicist Augustine Fresnel&comma; the Augustin Fresnel first used this lens design to build a glass Fresnel lens - lighthouse lens in 1822&period;

The Fresnel lens is a thin&comma; flat optical lens which consists of a series of small narrow concentric grooves on the surface&period; Each groove is at a slightly different angle than the next and with the same focal length in order to focus the light toward a central focal point&period; Every groove can be considered as an individual small lens to bend parallel Fresnel light waves and focus the light&period; The lens actually eliminates some spherical aberration&period;

A high groove density has a better quality projection image&period; The Fresnel lens is a good solution for quality image and efficiency at a significantly lower cost&period; The Fresnel lens is usually corrected for spherical aberration&period;